CHAPTER 4. ORGANIZATIONAL MAINTENANCE

TM-11-5985-355-13

CHAPTER 4

ORGANIZATIONAL MAINTENANCE

Procedures column of table 4-1, report the failure in

WARNING

accordance with the procedures specified in TM 38-750.

Dangerous voltages exist at the AS-

d. If the equipment must be kept in constant

2731/GRC antenna and connectors.

operation, check and service only those items that can

Personnel should be familiar with the

be done without disturbing operation.

Make the

requirements of TB SIG 291 before

complete checks and services when the equipment can

attempting maintenance.

be shut down.

4-1. Scope of Organizational Maintenance

e. Routine checks are not listed in the PMCS

Organizational maintenance of the AS-2731/GRC

table; such as: cleaning (para 3-3), dusting, washing;

consists of the following:

checking for frayed cables; stowing items not in use;

a. Preventive maintenance (para 4-3).

covering unused receptacles; and checking for loose

b. Troubleshooting (para 4-5).

nuts and bolts. These are things that should be done

c. Repair and testing (para 4-6 through 4-9).

anytime you see they must be done.

4-2. Test Equipment, Tools and Materials Re-

4-4. Touchup Painting

quired

a. When the finish on any metal parts of the MX-

Organizational repair parts are listed in TM 11-5985-355-

9146/GRC has been badly scarred or damaged by

24P.

corrosion, lightly clean the surfaces with sandpaper.

a. Test Equipment.

Brush two thin coats of paint (item 5, app E) on the bare

(1) Multimeter AN/URM-105.

metal surface (previously painted areas only) to protect it

(2) Test Set, RF Power AN/URM-182 (TS-

from further corrosion. Refer to the applicable painting

2609/U) (para 4-9).

and refinishing instructions given in SB 11-57:3 and TB

b. Tools. Tool Kit, Electronic Equipment TK-

43-0118.

101/G. (Torque wrench, 0-100 inch-pounds is part of the

b. The plastic body of the MX-9146/GRC shall be

tool kit.)

painted only with paint type recommended per MIL-F-

c. Materials. See appendix E for available

14072 (item 8, app F), and the surface should be

materials.

cleaned with a clean cloth dampened with water and

4-3. Organizational Preventive Maintenance

soap. Do not attempt to remove the paint. The paint

Checks and Services (PMCS)

remover solvent will damage the plastic surface. If the

Preventive maintenance is the systematic care,

vehicle is to be painted. remove the -IX-91461/GRC.

inspection, and servicing of equipment to maintain it in

4-5. Organizational Maintenance Trouble-

serviceable condition, prevent breakdowns, and assure

shooting Procedures

maximum operational capability.

Organizational

Perform the applicable organizational maintenance

preventive maintenance checks and services (PMCS)

procedure using the technical manual for the radio set

are performed quarterly (table 4-1).

which the AS-2731/GRC is used. If it is determined that

Quarterly PMCS will be scheduled in

the

AS-2731/GRC

defective,

perform

the

accordance with procedures specified in TM 38-750.

troubleshooting operations given in the troubleshooting

b. The Item No. in table 4-1 shall be used as a

chart (table 4-2). If the corrective measures given in the

source of item numbers for the TM number column on

chart do not clear the trouble, higher category

DA Form 2404 (Equipment Inspection and Maintenance

maintenance is required.

Worksheet) in recording the results of the PMCS.

c. If the equipment fails to meet the criteria in the

Change 2 4-1